EP 3969628 A1 20220323 - A COLD ROLLED MARTENSITIC STEEL AND A METHOD OF MARTENSITIC STEEL THEREOF
Title (en)
A COLD ROLLED MARTENSITIC STEEL AND A METHOD OF MARTENSITIC STEEL THEREOF
Title (de)
KALTGEWALZTER MARTENSITISCHER STAHL UND VERFAHREN FÜR MARTENSITISCHEN STAHL
Title (fr)
ACIER MARTENSITIQUE LAMINÉ À FROID ET PROCÉDÉ D'ACIER MARTENSITIQUE S'Y RAPPORTANT
Publication
Application
Priority
- IB 2019054022 W 20190515
- IB 2020052999 W 20200330
Abstract (en)
[origin: WO2020229877A1] A cold rolled martensitic steel sheet comprising of the following elements, expressed in percentage by weight: 0.1%≦C≦0.2%;1.5% ≦ Mn ≦ 2.5%;0.1% ≦ Si ≦ 0.25%; 0.1% ≦ Cr ≦ 1%; 0.01% ≦ Al ≦ 0.1%; 0.001% ≦ Ti ≦ 0.1%;0% ≦ S ≦ 0.09%;0% ≦ P ≦ 0.09%;0% ≦ N ≦ 0.09%; and can contain one or more of the following optional elements0% ≦ Ni ≦ 1%;0% ≦ Cu ≦ 1%;0% ≦ Mo ≦ 0.4%;0% ≦ Nb ≦ 0.1%;0% ≦ V≦ 0.1%;0% ≦ B ≦ 0.05%;0% ≦Sn≦ 0.1%;0% ≦ Pb≦ 0.1%;0% ≦ Sb≦ 0.1%;0.001% ≦ Ca≦ 0.01%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel comprising, by area percentage, at least 95% of martensite, a cumulated amount of ferrite and bainite between 1 % and 5%, and an optional amount of residual austenite between 0% and 2%.
IPC 8 full level
C21D 8/02 (2006.01)
CPC (source: EP KR US)
B21C 47/02 (2013.01 - KR); C21D 1/19 (2013.01 - EP US); C21D 1/26 (2013.01 - EP); C21D 6/004 (2013.01 - US); C21D 6/005 (2013.01 - US); C21D 6/008 (2013.01 - US); C21D 8/0226 (2013.01 - KR); C21D 8/0236 (2013.01 - KR); C21D 8/0273 (2013.01 - KR); C21D 8/0405 (2013.01 - US); C21D 8/041 (2013.01 - EP); C21D 8/0426 (2013.01 - EP US); C21D 8/0436 (2013.01 - EP US); C21D 8/0463 (2013.01 - EP US); C21D 8/0473 (2013.01 - EP); C21D 9/46 (2013.01 - US); C21D 9/48 (2013.01 - EP); C22C 38/001 (2013.01 - EP KR US); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP KR US); C22C 38/58 (2013.01 - EP KR US); C22C 38/60 (2013.01 - KR); C21D 2211/002 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP KR US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2020229877 A1 20201119; BR 112021021486 A2 20211221; CA 3140117 A1 20201119; CA 3140117 C 20240102; CN 113748219 A 20211203; CN 113748219 B 20230620; EP 3969628 A1 20220323; JP 2022532625 A 20220715; JP 2024045307 A 20240402; KR 20210149145 A 20211208; MA 55949 A 20220323; US 2022213573 A1 20220707; WO 2020229898 A1 20201119; ZA 202107698 B 20220629
DOCDB simple family (application)
IB 2019054022 W 20190515; BR 112021021486 A 20200330; CA 3140117 A 20200330; CN 202080031509 A 20200330; EP 20716219 A 20200330; IB 2020052999 W 20200330; JP 2021568028 A 20200330; JP 2024009308 A 20240125; KR 20217036177 A 20200330; MA 55949 A 20200330; US 202017610906 A 20200330; ZA 202107698 A 20211012